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8th Grade Forensic Science
Fingerprint Principles
 A fingerprint is an individual characteristic; no two
people have been found with the exact same ...
A visual inspection of
friction skin reveals a
series
of
lines
corresponding to hills
(ridges) and valleys
(grooves). The ...
Skin is composed of layers
of cells. Those nearest the
surface make up the outer
portion of the skin known as
the epidermi...
Fingerprint Classes
 There are 3 specific classes for all fingerprints based
upon their visual pattern: Arches, Loops, an...
Interesting Info
Did you know
Fingerprint
Factoid ?

60% Loop

30% Whorl

5% Arch
Principle #3: Arches
 The plain arch is the simplest of all fingerprint patterns.
It is formed by ridges entering from on...
Arches
Arches are the simplest type of fingerprints that are formed by
ridges that enter on one side of the print and exit...
Arches

Be
practical, caut
ious and
suspicious
thinker.

Always in
search for a
concrete proof
of ideas.

Find
security, s...
LOOP
Loops must have one delta and one or more ridges that enter and
leave on the same side. These patterns are named for ...
Principle #3: Loops
The pattern area of the loop
is surrounded by two
diverging ridges known as
type lines. The ridge poin...
Principle #3: Loops
To many, a fingerprint delta
resembles the silt formation
that builds up as a river flows
in the entra...
LOOP

Delta

Ulnar Loop (Right Thumb)
Loop opens toward
right or the ulna bone.
Willing to be in
the flow of life

Be adap...
LOOP
Delta

Radial Loop (Right Thumb)
Loop opens toward the
left or the radial bone.

Has strong
innovative
ability

Use c...
Whorls
Whorls have at least one ridge that makes (or tends to make) a
complete circuit. They also have at least two deltas...
Whorls
Whorls have at least one ridge that makes (or tends to make) a
complete circuit. They also have at least two deltas...
Whorls
Accidental Whorl
Double Loop Whorl

Delta

Delta

Double loop whorls are
made up of any two loops
combined into one...
Identify each fingerprint pattern.

Left Hand

Right Hand

Right Hand

Right Hand

Left Hand
It’s time to make
some prints!

Avoid
Partial
Prints

GOOD PRINT
Get as much of the top part
of your finger as possible!
Principle #1
If prints are to match, they
must reveal characteristics
that
not
only
are
identical, but have the
same relat...
HOW TO DISCOVER
YOUR INBORN TALENTS ?
• Dermatoglyphics
• Your best solution.

EXPLORE MORE
AT I-TALENTS
VIET POTENTIAL EDUCATION

TECHNOLOGY APPLICATION
COMPANY LIMITED.
261 Nguyen Van Troi st, W10, Dist Phu Nhuan
Hotline: 093...
[I-TALENTS] - GIẢI MÃ VÂN TAY
[I-TALENTS] - GIẢI MÃ VÂN TAY
[I-TALENTS] - GIẢI MÃ VÂN TAY
[I-TALENTS] - GIẢI MÃ VÂN TAY
[I-TALENTS] - GIẢI MÃ VÂN TAY
[I-TALENTS] - GIẢI MÃ VÂN TAY
[I-TALENTS] - GIẢI MÃ VÂN TAY
[I-TALENTS] - GIẢI MÃ VÂN TAY
[I-TALENTS] - GIẢI MÃ VÂN TAY
[I-TALENTS] - GIẢI MÃ VÂN TAY
[I-TALENTS] - GIẢI MÃ VÂN TAY
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[I-TALENTS] - GIẢI MÃ VÂN TAY

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Hotline: 0938 80 5757

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[I-TALENTS] - GIẢI MÃ VÂN TAY

  1. 1. 8th Grade Forensic Science
  2. 2. Fingerprint Principles  A fingerprint is an individual characteristic; no two people have been found with the exact same fingerprint pattern.  A fingerprint pattern will remain unchanged for the life of an individual; however, the print itself may change due to permanent scars and skin diseases.  Fingerprints have general characteristic ridge patterns that allow them to be systematically identified.  In fact identical twins can have same DNA, but completely different fingeprints.
  3. 3. A visual inspection of friction skin reveals a series of lines corresponding to hills (ridges) and valleys (grooves). The shape and form of the skin ridges are what one sees as the black lines of an inked fingerprint impression.
  4. 4. Skin is composed of layers of cells. Those nearest the surface make up the outer portion of the skin known as the epidermis, and the inner skin is known as the dermis. A cross section of skin reveals a boundary of cells separating the epidermis and dermis. The shape of this boundary, made up of dermal papillae, determines the form and pattern of the ridges on the surface of the skin.
  5. 5. Fingerprint Classes  There are 3 specific classes for all fingerprints based upon their visual pattern: Arches, Loops, and Whorls.  Each group is divided into smaller groups as seen in the lists below. Arch Plain arch Tented arch ……. Loop Radial Loop Ulnar loop Whorl Plain whorl Central pocket whorl Double loop whorl …….
  6. 6. Interesting Info Did you know Fingerprint Factoid ? 60% Loop 30% Whorl 5% Arch
  7. 7. Principle #3: Arches  The plain arch is the simplest of all fingerprint patterns. It is formed by ridges entering from one side of the print and exiting on the opposite side. Generally, these ridges tend to rise in the center of the pattern, forming a wavelike pattern.  The tented arch is similar to the plain arch except that instead of rising smoothly at the center, there is a sharp upthrust or spike, or the ridges meet at an angle that is less than 90 degrees.  Arches do not have type lines, deltas, or cores.
  8. 8. Arches Arches are the simplest type of fingerprints that are formed by ridges that enter on one side of the print and exit on the other. No deltas are present. Spike or “tent” Plain Arch Tented Arches Ridges enter on one side and exit on the other side. Similar to the plain arch, but has a spike in the center.
  9. 9. Arches Be practical, caut ious and suspicious thinker. Always in search for a concrete proof of ideas. Find security, ste p by step
  10. 10. LOOP Loops must have one delta and one or more ridges that enter and leave on the same side. These patterns are named for their positions related to the radius and ulna bones. Delta Ulnar Loop (Right Thumb) Loop opens toward right or the ulna bone. Radial Loop (Right Thumb) Loop opens toward the left or the radial bone. NOTE: On the left hand, a loop that opens to the left would be an ulnar loop, while one that opens to the right would be a radial loop.
  11. 11. Principle #3: Loops The pattern area of the loop is surrounded by two diverging ridges known as type lines. The ridge point at or nearest the type-line divergence and located at or directly in front of the point of divergence is known as the delta.
  12. 12. Principle #3: Loops To many, a fingerprint delta resembles the silt formation that builds up as a river flows in the entrance of a lake hence the analogy to the geological formation known as a delta. All loops must have one delta. The core, as the name suggests, is the approximate center of the pattern.
  13. 13. LOOP Delta Ulnar Loop (Right Thumb) Loop opens toward right or the ulna bone. Willing to be in the flow of life Be adaptable, easy –going and flexible Express yourself according to your feeling
  14. 14. LOOP Delta Radial Loop (Right Thumb) Loop opens toward the left or the radial bone. Has strong innovative ability Use converse thinking, out-of –world methods to manage work Be judgmental characteristics
  15. 15. Whorls Whorls have at least one ridge that makes (or tends to make) a complete circuit. They also have at least two deltas. If a print has more than two deltas, it is most likely an accidental. Central Pocket Whorl Plain Whorl Goal – oriented people Be strict task masters Fixed opinions and strong views.
  16. 16. Whorls Whorls have at least one ridge that makes (or tends to make) a complete circuit. They also have at least two deltas. If a print has more than two deltas, it is most likely an accidental. Plain Whorl Central Pocket Whorl Draw a line between the two deltas in the plain and central pocket whorls. If some of the curved ridges touch the line, it is a plain whorl. If none of the center core touches the line, it is a central pocket whorl.
  17. 17. Whorls Accidental Whorl Double Loop Whorl Delta Delta Double loop whorls are made up of any two loops combined into one print. Accidental whorls contain two or more patterns (not including the plain arch), or does not clearly fall under any of the other categories.
  18. 18. Identify each fingerprint pattern. Left Hand Right Hand Right Hand Right Hand Left Hand
  19. 19. It’s time to make some prints! Avoid Partial Prints GOOD PRINT Get as much of the top part of your finger as possible!
  20. 20. Principle #1 If prints are to match, they must reveal characteristics that not only are identical, but have the same relative location to one another in a print. In a judicial proceeding, a point-by-point comparison must be demonstrated by the expert, using charts.
  21. 21. HOW TO DISCOVER YOUR INBORN TALENTS ? • Dermatoglyphics • Your best solution. EXPLORE MORE AT I-TALENTS
  22. 22. VIET POTENTIAL EDUCATION TECHNOLOGY APPLICATION COMPANY LIMITED. 261 Nguyen Van Troi st, W10, Dist Phu Nhuan Hotline: 0938 80 5757 Website: www.i-talents.vn Email: anna.v@i-talents.vn

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